package cn.anstone.util;

import java.util.List;

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;


/**
 * 自定义响应结构
 * 
 * @author J.L.Lee
 * @date  Apr 27, 2017
 */
public class MyResult {
	
	 // 定义jackson对象
    private static final ObjectMapper MAPPER = new ObjectMapper();

    // 响应业务状态
    private Integer status;

    // 响应消息
    private String msg;

    // 响应中的数据
    private Object data;
    
    public MyResult() {}
    
    public MyResult(Object data) {
    	
        this.status = 200;
        this.msg = "OK";
        this.data = data;
    }
    
    public MyResult(Integer status, String msg, Object data) {
        this.status = status;
        this.msg = msg;
        this.data = data;
    }
    
    public Integer getStatus() {
    	
        return status;
    }

    public void setStatus(Integer status) {
    	
        this.status = status;
    }

    public String getMsg() {
    	
        return msg;
    }

    public void setMsg(String msg) {
    	
        this.msg = msg;
    }

    public Object getData() {
    	
        return data;
    }

    public void setData(Object data) {
    	
        this.data = data;
    }

    public static MyResult ok() {
    	
        return new MyResult(null);
    }
    
    public static MyResult ok(Object data) {
    	
        return new MyResult(data);
    }

    public static MyResult build(Integer status, String msg) {
    	
    	return new MyResult(status, msg, null);
    }
    
    public static MyResult build(Integer status, String msg, Object data) {
        
    	return new MyResult(status, msg, data);
    }

    /**
     * 将json结果集转化为ShopResult对象
     * 
     * @param jsonData json数据
     * @param clazz ShopResult中的object类型
     * @return
     */
    public static MyResult formatToPojo(String jsonData, Class<?> clazz) {
       
    	try {
    		
            if (clazz == null) {
            	
                return MAPPER.readValue(jsonData, MyResult.class);
            }
            JsonNode jsonNode = MAPPER.readTree(jsonData);
            
            JsonNode data = jsonNode.get("data");
            
            Object obj = null;
            
            if (clazz != null) {
            	
                if (data.isObject()) {
                	
                    obj = MAPPER.readValue(data.traverse(), clazz);
                
                } else if (data.isTextual()) {
                	
                    obj = MAPPER.readValue(data.asText(), clazz);
                }
            }
            
            return build(jsonNode.get("status").intValue(), jsonNode.get("msg").asText(), obj);
            
        } catch (Exception e) {
        	
            return null;
        }
    }

    /**
     * 没有object对象的转化
     * 
     * @param json
     * @return
     */
    public static MyResult format(String json) {
      
    	try {
    		
            return MAPPER.readValue(json, MyResult.class);
      
    	} catch (Exception e) {
    		
            e.printStackTrace();
        }
        return null;
    }

    /**
     * Object是集合转化
     * 
     * @param jsonData json数据
     * @param clazz 集合中的类型
     * @return
     */
    public static MyResult formatToList(String jsonData, Class<?> clazz) {
        try {
            JsonNode jsonNode = MAPPER.readTree(jsonData);
         
            JsonNode data = jsonNode.get("data");
          
            Object obj = null;
            
            if (data.isArray() && data.size() > 0) {
                
            	obj = MAPPER.readValue(data.traverse(),
                        MAPPER.getTypeFactory().constructCollectionType(List.class, clazz));
            }
         
            return build(jsonNode.get("status").intValue(), jsonNode.get("msg").asText(), obj);
        } catch (Exception e) {
          
        	return null;
        }
    }

}
